docs: def manhattan(h1, h2): # # 7 us @array, 31 us @list \w 100 bins
      r"""
      Equal to Minowski distance with :math:`p=1`.
      
      See also
      --------
      minowski
      """
      h1, h2 = __prepare_histogram(h1, h2)
      return scipy.sum(scipy.absolute(h1 - h2))